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Power Systems

Power Systems
The rating of fuse wire is always expressed in

  kWh.
  amperes.
  ampere-volts.
  ampere-hours.

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Power Systems
In kaplan runner, the number of blades is generally of the order of

  3 - 6.
 12 - 16.
  16 - 24.
 1 - 2.

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Power Systems
A transmission line has a surge impedance of 400 Ω is connected with the cable having surge impedance of 40 Ω, a surge magnitude of 100 kV is travelling from the transmission line towards the cable. Find the incident current?

 100 A
 250 A
 2500 A
 200 A

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Power Systems
The fact that current density is higher at the surface when compared to centre is known as

All of these
 carona
 skin effect
 proximity effect

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Power Systems
A 20 MVA generator has inertia constant of 0.5 pu. Find new value for 50 MVA base?

 0.5 pu
 0.4 pu
 0.1 pu
 0.2 pu

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Power Systems
A thermal protection switch is used to provide protection against

 temperature.
 short circuit.
  overload.
 over voltage.

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